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	<head>
		<title>three.js webgl - loaders - PRWM loader</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
		<style>
			.notes {
				position: fixed;
				text-align: left;
				bottom: 10px;
				font-family: "Arial", "Helvetica Neue", "Helvetica", sans-serif;
			}
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	</head>
	<body>

		<div id="info">
			<strong>Models</strong>:
			<a class="model" href="models/prwm/faceted-nefertiti.*.prwm">Faceted Nefertiti</a>,
			<a class="model" href="models/prwm/smooth-suzanne.*.prwm">Smooth Suzanne</a>,
			<a class="model" href="models/prwm/vive-controller.*.prwm">Vive Controller</a>
			<div class="notes">
				The parsing of PRWM file is especially fast when the endianness of the file is the same as the endianness of the client platform.
				The loader will automatically replace the <strong>*</strong> in the model url by either <strong>le</strong> or <strong>be</strong> depending on the client platform's endianness to download the most appropriate file. <a href="https://github.com/kchapelier/PRWM" target="_blank" rel="noopener noreferrer">Specifications and implementations</a><br><br>
				This platform endianness is <strong id="endianness"></strong>.<br>
				See your console for stats.
			</div>
		</div>

		<script type="module">

			import * as THREE from '../build/three.module.js';

			import { PRWMLoader } from './jsm/loaders/PRWMLoader.js';

			let camera, scene, renderer;

			let mouseX = 0, mouseY = 0;

			let windowHalfX = window.innerWidth / 2;
			let windowHalfY = window.innerHeight / 2;

			init();
			animate();


			function init() {

				document.getElementById( 'endianness' ).innerHTML = PRWMLoader.isBigEndianPlatform() ? 'big-endian' : 'little-endian';
				const container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
				camera.position.z = 250;

				// scene

				scene = new THREE.Scene();

				const ambient = new THREE.AmbientLight( 0x101030 );
				scene.add( ambient );

				const directionalLight = new THREE.DirectionalLight( 0xffeedd );
				directionalLight.position.set( 0, 0, 1 );
				scene.add( directionalLight );

				// model

				const loader = new PRWMLoader();
				const material = new THREE.MeshPhongMaterial( {} );
				let busy = false;
				let mesh = null;

				const onProgress = function ( xhr ) {

					if ( xhr.lengthComputable ) {

						const percentComplete = xhr.loaded / xhr.total * 100;
						console.log( Math.round( percentComplete, 2 ) + '% downloaded' );

						if ( xhr.loaded === xhr.total ) {

							console.log( 'File size: ' + ( xhr.total / 1024 ).toFixed( 2 ) + 'kB' );
							console.timeEnd( 'Download' );

						}

					}

				};

				const onError = function () {

					busy = false;

				};

				function loadGeometry( url ) {

					if ( busy ) return;

					busy = true;

					if ( mesh !== null ) {

						scene.remove( mesh );
						mesh.geometry.dispose();

					}

					console.log( '-- Loading', url );
					console.time( 'Download' );

					loader.load( url, function ( geometry ) {

						mesh = new THREE.Mesh( geometry, material );
						mesh.scale.set( 50, 50, 50 );
						scene.add( mesh );

						console.log( geometry.index ? 'indexed geometry' : 'non-indexed geometry' );
						console.log( '# of vertices: ' + geometry.attributes.position.count );
						console.log( '# of polygons: ' + ( geometry.index ? geometry.index.count / 3 : geometry.attributes.position.count / 3 ) );
						busy = false;

					}, onProgress, onError );

				}

				//

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				document.addEventListener( 'mousemove', onDocumentMouseMove );

				//

				document.querySelectorAll( 'a.model' ).forEach( function ( anchor ) {

					anchor.addEventListener( 'click', function ( e ) {

						e.preventDefault();

						loadGeometry( anchor.href );

					} );

				} );

				//

				// * is automatically replaced by 'le' or 'be' depending on the client platform's endianness
				loadGeometry( './models/prwm/smooth-suzanne.*.prwm' );

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				windowHalfX = window.innerWidth / 2;
				windowHalfY = window.innerHeight / 2;

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function onDocumentMouseMove( event ) {

				mouseX = ( event.clientX - windowHalfX ) / 2;
				mouseY = ( event.clientY - windowHalfY ) / 2;

			}

			//

			function animate() {

				requestAnimationFrame( animate );
				render();

			}

			function render() {

				camera.position.x += ( mouseX - camera.position.x ) * .05;
				camera.position.y += ( - mouseY - camera.position.y ) * .05;

				camera.lookAt( scene.position );

				renderer.render( scene, camera );

			}

		</script>

	</body>
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